Comments:[But for PIE cf. also PA *sū̀re 'sour']. Esk.-Al. *civaʁa 'sorrel'.
References:ND 363 *c̣uyrV 'rot, stink, be spoiled/bitter' compares Kartv. with Alt. *č`ire (see *č̣irV) and FU *ć[uy]rV 'bitter, sour' (which - if it exists - is a better match for Alt. *či̯obeŕV and Drav. *śovar); ND 2113 *SuH/wErV 'sour, seasoned' compares IE *sūr-, Alt. *sūre and the same Ur. *ć[uy]rV. Obviously several roots.